Earth's Structure and Life Essentials

What essential resources does Earth provide that are necessary for life?

• Food, water, and air

• Gold, silver, and diamonds

• Oil, gas, and coal

• Rocks, sand, and mud

How old is the Earth estimated to be?

• Thousands of years

• Millions of years

• Billions of years

• Hundreds of years

What process helped form Earth from the remaining particles of a dead star?

• Volcanic eruptions

• Gravity

• Wind erosion

• Water currents

What is the name of the solid innermost layer of Earth?

• Mantle

• Outer core

• Inner core

• Crust

What is the approximate temperature of Earth's solid inner core?

• 100 degrees Celsius

• 1,000 degrees Celsius

• 5,200 degrees Celsius

• 10,000 degrees Celsius

What is the mantle of Earth primarily made of?

• Solid iron and nickel

• Water and ice

• Silicates, magnesium oxide, and other metals

• Gaseous elements

Which layer of Earth is the rocky outer crust where life exists?

• Inner core

• Outer core

• Mantle

• Crust

What is Earth's position in the solar system relative to the Sun?

• First planet

• Second planet

• Third planet

• Fourth planet

Why is Earth's temperature suitable for life, unlike planets like Jupiter or Mercury?

• It has a very thick atmosphere

• It is covered in oceans

• It has a balanced climatic condition

• It has many volcanoes

What are the three states in which water can be found on Earth?

• Hot, cold, and warm

• Solid, liquid, and gas

• Fresh, salty, and brackish

• Underground, surface, and atmospheric